It crystallizes in the orthorhombic system and forms translucent bright blue acicular crystal clusters or Refractive indices are n? = 1.588 n? = 1.617 n? = 1.655.
12.
Finely crystallized specimens have been obtained from the Friedrichssegen mine in Lahnstein in Rhineland-Palatinate, Johanngeorgenstadt in Saxony, StY�bro in the Czech Republic, Phoenixville in Pennsylvania, acicular crystals of considerable length were found long ago in the Pentire Glaze mine near St Minver in Cornwall.
13.
At the Minerva Number 1 Mine ( Ozark-Mahoning Number 1 Mine ) Ozark-Mahoning Group, Cave-in-Rock, Illinois, in the Kentucky Fluorspar District, Hardin County strontanite occurs as white, brown or rarely pink tufts and bowties of acicular crystals with slightly curved terminations.
